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From "Jordan Zimmerman (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CURATOR-10) NPE from JMX infrastructure in curator-test
Date Mon, 10 Jun 2013 22:38:20 GMT

     [ https://issues.apache.org/jira/browse/CURATOR-10?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jordan Zimmerman updated CURATOR-10:
------------------------------------

    Assignee: Jordan Zimmerman
    
> NPE from JMX infrastructure in curator-test
> -------------------------------------------
>
>                 Key: CURATOR-10
>                 URL: https://issues.apache.org/jira/browse/CURATOR-10
>             Project: Apache Curator
>          Issue Type: Bug
>          Components: General
>    Affects Versions: 2.0.0-incubating
>            Reporter: Shevek
>            Assignee: Jordan Zimmerman
>         Attachments: ByteCodeRewrite-ZooKeeper-3.5.x.patch
>
>
> QuorumPeer.java contains this:
> finally { MBeanRegistry.getInstance().unregisterAll(); }
> Since MBeanRegistry is static, this unregisters all MBeans from ALL QuorumPeers in a
TestingCluster.
> This causes:
> [ERROR] NIOServerCnxnFactory - Thread Thread[QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:41733,5,main]
died <java.lang.AssertionError>java.lang.AssertionError
>         at org.apache.zookeeper.jmx.MBeanRegistry.register(MBeanRegistry.java:89)
>         at org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:771)
>         at org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:912)
> and similar when connecting a new client to a server after killing another in a test
suite.
> Looking for a workaround, but bringing this to your attention early.
> Note: Code against ZK 3.5.x library, although that unregisterAll() call seems to predate
that by a long way, so this is presumably valid throughout?

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